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https://issues.apache.org/jira/browse/SOLR-14774?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17184740#comment-17184740
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Tomas Eduardo Fernandez Lobbe commented on SOLR-14774:
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Thanks Ishan, I think that would require a whole lot of other changes and
discussions to be had (none of the top level components as they are now are
dynamic, the standalone case, etc).
[~noble.paul], let me know if you still have concerns, otherwise I'll merge
tomorrow to master and 8.x
> HealthCheckHandler shouldn't be an implicit SolrCore level handler and should
> be configurable
> ---------------------------------------------------------------------------------------------
>
> Key: SOLR-14774
> URL: https://issues.apache.org/jira/browse/SOLR-14774
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Tomas Eduardo Fernandez Lobbe
> Priority: Major
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> While trying to use the HealthCheckHandler I noticed that:
> * CoreContainer has some logic to read config from {{solr.xml}}, however,
> this is never used, and the handler is constructed explicitly inside
> {{InfoHandler}}. This means you can't plugin a different implementation.
> * Also noticed that it was added as an implicit plugin to the {{SolrCore}}.
> which means one could access the handler like
> {{/<collection-or-core>/admin/health}}, however, this will never work, since
> it uses a parameterless constructor, which leaves the handler in an invalid
> state [1]. I honestly don't know why it's being added to the {{SolrCore}},
> this is supposed to be a node level handler, and for SolrCore one could use
> the {{PingRequestHandler}}
>
> [1]
> {noformat}
> 2020-08-21 21:14:06.094 ERROR (qtp599782425-18) [c:test s:shard1 r:core_node4
> x:test_shard1_replica_n2] o.a.s.s.HttpSolrCall
> null:org.apache.solr.common.SolrException: CoreContainer is either not
> initialized or shutting down
> at
> org.apache.solr.handler.admin.HealthCheckHandler.handleRequestBody(HealthCheckHandler.java:96)
> at
> org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:214)
> at org.apache.solr.core.SolrCore.execute(SolrCore.java:2606)
> at org.apache.solr.servlet.HttpSolrCall.execute(HttpSolrCall.java:812)
> at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:588)
> at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:415)
> at
> org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:345)
> at
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1596)
> at
> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:545)
> at
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
> at
> org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:590)
> at
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
> at
> org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235)
> at
> org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1610)
> at
> org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
> at
> org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1300)
> at
> org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
> at
> org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:485)
> at
> org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1580)
> at
> org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
> at
> org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1215)
> at
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
> at
> org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:221)
> at
> org.eclipse.jetty.server.handler.InetAccessHandler.handle(InetAccessHandler.java:177)
> at
> org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:146)
> at
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
> at
> org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:322)
> at
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
> at org.eclipse.jetty.server.Server.handle(Server.java:500)
> at
> org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:383)
> at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:547)
> at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:375)
> at
> org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:273)
> at
> org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
> at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
> at
> org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117)
> at
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:336)
> at
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:313)
> at
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:171)
> at
> org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:129)
> at
> org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:375)
> at
> org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:806)
> at
> org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:938)
> at java.base/java.lang.Thread.run(Thread.java:834) {noformat}
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